Load-equalizer for electric circuits.



f 'f 4 I l Y T i V i i i vl l i\ ILT-ED bTAllEtJ PATEB l OFEICE..

i- /y i i Ji\ JOHN SEDGWKCK PCK. OF MANCHESTEIQQXSGLAXD. ASSGC P. i T. H. GIVEN, H. S. A. STEW A RT', AND E. 1,1. HERR. Oli` PITTSBURG PEXXSYLVAXB, RTJEEVERS OF WESTINGHOUSE i ELECTRIC 3: BLLCL'-FAC'IURINGACOMP OF EAST P1 QI-1G, PEXNSYLYANIA, A COR- g PORATlON OF ENNSYLVANIA'.' l y f LoAD-EQUALizEBEon minerais crscuiis. i

1 Nm 894,979. Specification of Petters Parent. Patetedtug. A4, 19Q8. a Y Appiiciaon iiieaiiuvember itlii -f' y l:

To all whom 'it fr 4clz'ncern.'

Beit known 'tn LJOHN SEDGwioK Pncii, j' 'name-electric machine 6; 55 va citizen of the l." States, and a resident l the"` rotor er which is provided with a Hy of Blanche-ster, in the county of LancasterJ Wheel S.' a England, have invented a new and useful- The I Lld magnet of the machine- .Gis1-dxf Improvement in Load-Equalizers vfor Ele cited hy s @vinding 9 in the circuit of tric Circuits, owhch the following is a specihieh a\r`iieostsa 10 is connectedin order to 60.. cationi l vary theexciteion of the machine 6,"either` 'i )ly invention relates to alternating curat will or 'auionzstically in accordance with 10. rent systems of electrical distribution and g the load on the svnply circuit 1 articularly to apgaratus for equalizing the oads on such systems. E rate rotoisil One means heretofore proposed for equali shaft 13 sri-he izing the load on sri alternating current. supl'a ply system comprises a rotary converter having its alternating current side connected to connect toyse'iie the su1pply circuit which may beeithei' single points in the or o yphase. The direct currxiitb-rushes 12 and the vr i of t ie rotary coni-errer are connected to the connected te Le segments of a c'0ini`ni\-at0r brushes of a direct current generator, the cylinderili tl eisiiiil manner.-

rotor of which is provided with a fly wheel. E The iii-o rotos 11 and 12 of the rotaryhon-' The field magnet the latter machine is exrerter 2` se g:siectively rovided 75l cited hy a shunt winding the circuit of which stator wir. and 17, t ie winding '1Q includes a rheosisi arranged tohe so operbeing of the tion motor type ivhile-the ated as to vary the'ield excitation, either at.- winding 17 is v ne ordinary direct current, will or iiiaccordanee with the load on the suptype es L fn in the figure, is ashunt\ i 1 ply circuit: I winding connezted across v the ln a number of cases, for instance in-colthrough e rhee; at 18. lierics, rolling iiiils and the like, inwhich a Each o the .ectrical cross coniiectors14 sloiwspeed induction motor is employed for; between the of the rotors AIl and 12 direct connection 'to the winding drum or the 3 is supplie-i with slip ring vI9 and'hrushcs 20 rolling mill` if the frequency of the supply lj bear upon ip rings and are'connected 5 circuit is high, the isrf'e number of poles reto the statesman. ng 21 ofthe Working motor Y quired toobtain the s ow speed necessitates Z2 which is Le. clown as an induction niotpr an extrenielv heen-T motor the cost of which having its r i 23 connected to a winding is often excessivedrum or mi?? by means of a pulleyor., The present invention has for itsobject to con ling 24. 90. obviate this "rantage and it consists in ne cross rsrfcion's 14 of the' rotary conreplacing the rotary converter of the'equalverterl may 'oe .ree or more in number and 40 innig system above mentioned by a rotary all, or a pari iiiay be connected to the converter of a spe l type. and in o eiatinu g lip rings fj" vnichtheworkinginotor 22 the slow-speed infraction motor by e corrie-: is suppiief clergy. 95 energy ohtainei E; .in intermediate points in l The meer?. ci" the. apparatus is as folthe windings of si. rotary converter. The ss connected rotors 11 and M v invention is illustrated in thevsingle 5 #ct-ive statoie and-17 figure of the acct anying drawing which is v converter the speed of a diagrammatic vien' of a system eiiihodying l which i pon the sutil, O the 111ml.- 100 the invention. g ners of o tiro stator windings 16 and Referring nov: to the drawing, a three i ie number o f alternations phase supply circuit indicated at l to supply circuit `divided by- 4nihers of pole-S in the two i i shove, to the brushes Oia-11 f converter 2 Acomprises two 'sepi and 12 mounted on thesanie 6'5 trically connected together.

exs connecting conductors 1 4.

4.are soarraiiged aste e symmetrically situatediY rigs of the rotors 11 and 70 "1g oftiie rotor 12 also Mmmm..

which a rotary converter 2 is connected hy the soin 'means of eoiiductois 3. The direct current stators. 105 brushes 4 of the rotary converter are con` i The cros conductors 14 and.

x l i A i i i l I: t i

l M'iQ-vr the slip rings 19 will be trayersed by alternating current energy :it e frequency of alternations per minute which is equal to the speed of the. combined rotors 11 and 12 1n revolutions er minute, nnitiplied by the number of po es of the direct current stator 17.

The following example wili illustrate this:

For a 50 period circuit.

1u- Frequency on Any desired frequency may thus he obtained for supplying tie working motor and this fre( uency may be so selected that the design of tlie motor may be most economical and at the saine time an equalization of the. loud on the su ply circuit may be eliected. T he power act-oi' of the current taken from the supply circuit hy the rotary converter' may he ndJusted in theusual way by varying the excitation of the direct curi-ent stator 17 of the rotary converter.

I claim as my invention:

1. ln an equalizing system for alternating current circuits, the combination with u 1'0- tary converter having two mechanically and electrically connected rotois and independcnt stator windings one of which is connected to the circuit to he regolari-d, of adynamoelectric machine eletftricalliP connected to one oi the members of the rotary converter and provided'with :i fly wheel, and :in induction motor having its stator winding connected to the rotor windings of the rotary converter.

2. All alternating current load-equulizing system comprising a rotary converter having two mechanically and electrically connected rotors and independent stator windings one of which is connected to the circuit to be regulated, induction motor having its stator wind'V connected to the motor windings of the rc electric me. ksine having ily whee and a 'shunt field n iet winding and havin it; armature electnciilly connect-ed to one o the members o the rotary converter` 3. In an ecnsilizing s l'stem for'alterimting.

current circuits. the combina-tion with a rotary convertehaving l'gwo mechanically and electrically connected rotors and independcnt stator windings one of which is connectcdto the circuit to be regulated, of a d nemoelectric msciiine having ii ily whee and a shunt field magnet winding and having its armature cV inccted to boththe rotor and stator windt N rotary converter, and an induction motor having its sstor winding connected' to the rotor windxgs of the rotary converter.

4. .in an equalizing system, the combination with s. dynamo-electric machine provided with s ily wheel, and. a. rotary converter having two electrically and mechanically connected rotors and having one rotor winding and the corresponding stator windparallel to the said dynamo ing connect elect-ric inzit-inne, the other sta-tor winding being connected to the 'circuit to he regulated, o f induction motor having itsstiitor winding connected to the rot-or windings of the rwtury converter.

5. I n an z-qiializiiig system, the combina tion with e shunt wound dyiiaiiio-clcctric machine provided with ii'ly wheel, und :i rotary converter having two electrically and mechanicsily connected rotors and having one rotor winding :ind the corrcsionding stator winding connected in parallel to the said dynanm electric n'itichine, the other stator win'i' g heilig connected to the circuit to he gulated, of an induction motor having 'its stator winding connected to the rotor windi of the rotary converter.

ln testizrmny whereof, I have hereunto subscribed my niime this lirst day of November, 1937- JOHN SllDGvVltK PECK.4

Witnesses:

Fiezexcie 'I-lomins, Gnoien: Winnen Pinnen.

ary converter, and a d 7namop of one of the members of the sol 

